(ITS#5405) syncprov psearch race condition

Full_Name: Howard Chu
Version: 2.4
OS:
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (76.91.220.157)
Submitted by: hyc
It's possible for a new update to be recorded after the syncprov_qtask has
examined its response queue but before it has removed itself from the slapd
runqueue. In this case, the qtask will not process the new response right away,
it won't see it until the next time an operation occurs on the server.